There are different codes depending on whether the Tivo was set to respond as a specific device (1 or 2) on the remote or by standard default (device 0). Also, typically each universal remote has its own code for each device, which is specific to the remote, not the device you wish to control. For the $20.00, it might not be a bad thing to simply buy a new universal remote that is capable of controlling a PVR (There are many good ones out there).